Improved scroll-saw stock



UNITED STATES PATENT OFFICE.

JOHNRIOHARDS, OF COLUMBUS, OHIO.

IMPROVED SCROLL-SAW STOCK.

S pacification forming'part of Letters Patent No. 35,391, dated May 27,18.62.

To all whom it may concern.-

Be it known that I, JOHN RIoHARDs, of Columbus, in the county ofFranklin and State of Ohio, have invented a new and useful Improvementin Scroll-Saw Stocks; and Ido hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming part of this specication, in which--Figure lis a sectional view of a scrollsaw stock and part of the mill.Fig. 2 is a perspective view of the split pin for clamping the saw inthe stock, the saw being set in the split thereof. Fig. 8 is a sectionalperspective view of the socketed head of the stock. Fig. 4 is a top endview of the stock with saw-blade in it.

y Similar letters of reference in Vthe several figures indicatecorresponding parts.

The nature of my invention consists in the tubular guiding-stock,whichadmits the upper vend of the pitman into it and allows the pitman todeiiect or bend within its lower portion, the said stock constituting apart of the length of the pitman without interfering with itsflexibility or rendering the length too great, and also serving as afirm lower support and guide to the saw-blade.

It consists, second, in a split pin, in combi- ,nation with a tubular orsocketed head-piece and a set-screw or its equivalent for fastening thesaw-blade in the tubular stock.

It consists, third, inthe socketed perforated head-piece, in combinationwith the bored pitman, its tapped holdfast, and a headed screwbolt forthe purpose of connecting the pitman and tubular stock together.

To enable others skilled in the art to make `and use my invention, Iwill proceed to describe the same with reference to the drawings.

The 'stock A is made hollow and out of wrought-iron pipe, so thatit,while answering the officedesigned for it,shall havethe requisitestrength and stiffness with the least amount of weight. The outercircumference of the stock is made with at portions, and is fittedwithin guide-boxes a a of a strong bracket, B, of the saw-mill frame, sothat it cannot turn, but is l free to move up and down.

The pitman Chas its upper end made solid and stiff, as at b,- but belowthe portion b itis thin and flexible, so that while its solid portionaords a firm and strong support and holdfast to the guidingstock A itsflexible portion c shall allow the necessary deflection from a straightline to take place as the eccentric revolves. It will be seen that theportion b of the pitman extends up nearly to the top of the`guiding-stock from near the middle thereof, and ts snugly to the innercircumference of the same. It will also be seen that the flexible part cextends up into the stock from the bottom of the stock to about the mid.d1ethereof,and there connects with or branches out into the solidportion b, as shown. This arrangement makes the guiding'stock a part ofthe length of the pitman, and yet does not add greatly to its lengthnecessarily, inasmuch as the full or nearly the full ilexibility of thepitman is allowed to come into play within the tubular stock. The pitmanis fastened within the stock and to a socketed head-piece, D, by meansof a nut, d, and bolt e, fastening the pitman, as it were, to the end ofthe saw. The socketed head-piece has a flange or collar near its upperedge and a screw-bolt hole through Y its seat on the bottom of thesocket.

The saw-blade E, which plays up and down through the tableF, is fastenedinto the/sockethead of the stock A by means of a split collapsible pin,g, and a set-screw, h, the pin fitting down into the socket-piece D andthe My improved guiding-stock shortens the Whole length of thereciprocating parts, for if the pitman is attached to the lower endofthe stock the length of the stock is added to the height of thesawmill, making the distance between the fop ofthe table and the cranko1' eccentric too great; but when the pitman is inserted into myguiding-stock its length is maintained almost completely, and yet a longguidestock for supporting and guiding the lower end of the saw secured,and all within n short distance. The guide-stock is also relieved of 2tportion of the strain by reason of the socketed head being disconnectedfrom the stock and bolted to the pitman.

I do not claimfastening a saw-blade by means of n set-screw; but

TWhat I do claim as myinvention, and desire to secure by Letters Patent,is-

JOHN RICHARDS. fr.. S.,]

wVl/Titnesses: s

GUsTAvUs Dimnnicn, EDWIN S. JACOB.

